Re: [DebianGIS] geos
Hi Alex,
On Sun, 2006-01-15 at 00:29 +0200, alex bodnaru wrote:
> hi steve,
>
> while libgeos_c provides a solid c api, it is calling the changing c++
> source, and may still differ internally for each c++ version.
But if the c wrapper doesn't change it's interface, then the abi can
still be stable though, right? Will changes to the underlying c++ affect
this? If so, then there is no hope for geos or gdal.
>
> moreover, the c api has no usage other than an interface to libgeos.
>
> thus, i would suggest making, if possible, only one library
> (libgeos.so.*), with the c api source linked in, and one package, as before.
To be clear, the .so split has been done by upstream. I haven't yet
tried to learn how to split them apart (for gdal) or merge them back
together.
>
> this way, c++ programs will still call c++ interface, while newer c
> programs will only use the stable c api, and will tolerate every change
> in libgeos due to upgrades, etc.
This seems to be conflicting advice. How can progs using the c api
tolerate libgeos c++ abi changes if they are in the same .so? The soname
will have to be bumped with every release for the c++ api. The point of
having them separate is so that their sonames can increase
independently.
Best,
Steve
>
> best regards,
>
> alex
>
> Steve Halasz wrote:
> > Hi,
> >
> > I've imported the geos control files into alioth cvs and made DebianGIS
> > the maintainer. Geos 2.2 has introduced a c api and I want to make sure
> > I get the split right. It now has libgeos_c.so.1.0.1 and
> > libgeos.so.2.2.1. So these are pretty easy to split into libgeosc1 and
> > libgeos2c2a packages. I'm less sure what to do with the -dev package.
> > There is a geos_c.h header and a geos.h header. But there are a number
> > of presumably shared .h files and geos-config. Maybe a
> > libgeos-dev-common package would help? Any advice appreciated.
> >
> > Steve
> >
> >
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> >
>
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